 The jet feeder is a stationary unit (Figure) designed for desliming or hydraulic classification of granular materials by density and their transportation as part of the slurry under the influence of a jet stream. The jet feeder consists of a vertical deslimer 1, which provides desliming, i.e. cleaning of granular material from dusty, clay, fine silt particles; raw material preparation hopper 2, which is designed to form the flow of raw materials to the vertical deslimer, cleaning the granular material from large granular particles, this prevents contamination of the granular material fed to the vertical deslimer; The jet pump 3 is used for further transportation of granular material purified from dusty, clay, fine muddy parts of the sand slurry to the next stages of processing or beneficiation of raw materials; support frame 4 supports the specified devices at a certain installation height.
The jet feeder works according to the following principle. Dry or wet raw materials are fed into the raw material preparation hopper. The mineral granular raw material in the hopper is mixed with a stream of water and moved in a distributed flow to the vertical deslimer. In a vertical deslimer, the granular raw material is stirred by jet nozzles and the separated particles move upward with a distributed flow of small particles and downward with larger particles.
The sludge is discharged outside the vertical deslimer. Larger particles are accumulated in the hopper of the vertical sand deslimer, from where the jet pump transports the granular material, purified from dusty, clay, fine muddy particles, as part of the sand slurry, to the next stages of processing or beneficiation of raw materials.
If a malfunction is detected in the operation of the plant, it is necessary to stop the operation of the jet feeder, turn off the power supply to the pump, then drain the slurry through the service pipe and only then is it allowed to carry out repair work. If excessive noise is detected during the operation of the jet feeder, check the pump for proper operation. If problems with the normal flow of material are detected, it is necessary to check the condition of the hydraulic conveying system for: damage, cracks, tears or clots that may slow down or make it impossible to operate the hydraulic conveying system.
In this work, a SolidWorks solid model was developed, technological and design parameters of the jet feeder were calculated, and the parameters of its components were substantiated.
References
Bondarenko, A. O., Malіarenko, P.О., Zapara, Ievgen, Bliskun, S.P. 2020. Testing of the complex for gravitational washing of sand. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (5), 26-32. https://doi.org/10.33271/nvngu/2020-5/026.
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